2.5. Reassignment of variables

It is possible to reassign a new value to
an already defined variable. This will destroy the reference to
its former value and create a new binding to the new value. This
is shown in Figure 2.2.

Figure 2.2. Reassigning values to variables

Note

In Python, it is possible to reassign a new value with a different type to a
variable. This is called dynamic typing,
because the type of the variable is assigned dynamically. Note
that this is not the case in all programming languages. Sometimes,
as in C, the type of variables is assigned
statically and has to be declared before use. This is some way
more secure because types of variables can be checked only by
examining the source code, whereas that is not possible if
variables are dynamically typed.